SCIENCE— ADVERTISEMENTS 



Journal of the Washington 

 Academy of Sciences 



Edited by George K. Burgess, Frederick Leslie 

 Ransome and Carl S. Scofield 



Appears semt-monfhlvr except in summer, when monfhtv 



Aime to serve as an American "ComptesRendus," and 

 in addition to give a complete record of the scientific 

 work done in Washington in the form of short original 

 papers, authors' abstracts of government and other pub- 

 lications, and the Proceedings of the Washington Scien- 

 tific Societies. 



Subscription $6 00 (post free) for the 18 months, July 

 1911 to December 1912, and $6.00 a year thereafter. 



Address ALFRED H. BROOKS Treasurer 



QBOLOQICAL SURVEY, WASHINGTON, D C. 



Sample copies sent on request 



ELEVENTH EDITION 



THB iVlICROSCOPE, 



an introduction to Microscopic Methods and to Histology, by 

 Simon Henrt Gage of Cornell University. The 11th edition 

 has eight pages of new matter and corrections, otherwise it is 

 like the 10th ed. Price $2.00 postpaid. 



COiWSTOCK PUBLISHINO CO., Ithaca, N. Y» 



Puget Sound Marine Station, Friday Harbor, 

 Washington 



Ninth Annual Session, June 24 to Aug. 3, 1912 



A well equipped laboratory in the midst of a rich and 



little known region. 



Instruction Research Collecting Supply Department 



For further information address the director, 



TREVOR KINCAID 



University ot Washington Seattle, Wash 



SCHOLARSHIP MAN 



in the phyBical sciences, vpith experience in university 

 work, thoroughly familiar with scientific methods and 

 literature, and with knowledge ot French, German, 

 Italian and Spanish, desires position with publisher 

 ot scientific literature, or in scientific institution. 

 Highest reterences. Address "J. W.," care "Science," 

 Garrison, N. Y. 



JULIEN'S POWER AND FOOT LATHES 



Use of Geologisti, Mineralogists, Petrographers, Met- 

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 POLISHING all hard substances, rocks, etc., and in 

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 3 Webster Terrace NEW ROCHELLE. N. Y. 



ROMEDCE^ 



PRESS CLIPPINGS 



are now an absolute necessity for every scientific man. 

 By methodical searching through the most important 

 papers and periodicals published in this country and 

 abroad we are able to supply you at short notice with 

 information on any subject which perhaps you would 

 be unable to find yourself in libraries or reference 

 books after spending days or even weeks at such a 

 task. Write tor further information. 



HENRY ROMEIKE* Inc. 

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SECOND EDITION, NOVEMBER, 1910 



AMERICAN MEN OF. SCIENCE 



A BIOGRAPHICAL DIRECTORY 



EDITED BY J. flcKEEN CATTELL 



A Biograiphical directory requirei remsion if it is to maintain its usefulness. Nearly a third of the names in the 

 preunt edition are new, and the sketches which appeared in the first division have in nearly every case been revised. The 

 amount of work required to prepare the revision has been as great as that given to the first edition. There has been no 

 chamge in the general plan of the work. Greater strictness has been observed in confining its scope to the natural and 

 exact leiences, and for this reason a few names included in the first edition have been omitted. Efforts have been exerted to 

 make the book as complete and accurate as possible. There are of coicrse omissions, if only because some men will not 

 reply even to repeated requests for the information needed. The thousand leading men of science have been again selected 

 by the methods that were used before, and stars have been added to the subjects of research in the case of 269 new men who 

 have obtained places on the list. The editor's object in selecting this group of scientific men has been to make a study of 

 the conditions on which scientific research depends and so far as may be to mvprove these conditions. Ihere are printed in 

 an appendix the two statistical studies that have bun made. — From the Preface to the Second Edition. 



The second edition ot the Directory extends to more than 600 pages and contains more than 5500 sketches. 

 It is well printed on all rag paper and bound in buckram with leather label. Although the work has been 

 increased in size by more than 50 per cent., it is sold at the same price as the first edition. 



Price : Five Dollars, net, Postage paid 



the; scibnce prbss 



GARRISON. N. Y. LANCASTER. PA. 



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